Related Questions

On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in
A Greater degree of separation with a fixed number of trays
B Increased reboiler load
C Increased reflux ratio
D None of these
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams
A Increases
B Decreases
C Remains unaffected
D Passes through a maximum
In a continuous distillation column, the optimum reflux ratio ranges from __________ times the minimum reflux ratio.
A 1.1 to 1.5
B 1.6 to 2
C 2.2 to 2.6
D 2.7 to 3
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will
A Increase
B Decrease
C Remain same
D Data insufficient, can't be predicted
Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at
A Heat conservation
B Yield enhancement
C Product enrichment
D None of these
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,
A Composition of vapors and that of liquid do not vary throughout the column
B Reboiler load and condenser load are minimum
C The top and bottom compositions are unchanged with and without total reflux
D The top and bottom compositions correspond to the maximum enrichment available
When the feed to a distillation column is a saturated liquid, slope of the feed line is
A Zero
B Unity
C Infinity
D None of these
What is the slope of the feed line, if the feed to a distillation column is a saturated liquid?
A 0
B ∞
C > 1
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed
A q > 1
B q
C q = 1
D q = 0
What is the reflux ratio at total reflux?
A Zero
B Infinity
C Unity
D Data insufficient

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